Defensive publication



DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.G. 687. The

abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically.

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Defensive Publication applications have not been examined as to the merits of alleged invention, no assertion as to the novelty of the disclosed subject matter.

PUBLISHED AUGUST 18, 1970 T877,011 USE OF SILVER PI-COMPLEX STABILIZERS Kenneth R. Dunham, Kodak Park Division, Rochester, N. Y. 14650 Filed Feb. 11, 1970, Ser. No. 10,638 Int. Cl. G03c 1/02, 5/38 US. CI. 96-94 No Drawing. 22 Pages Specification A developed image in a photographic element containing a photographic pi-complex of a silver salt, especially a water-soluble silver salt and an organic compound, such as a silver cycloheptatriene pi-complex, can be stabilized With a silver pi-complex stabilizer, such as a thiadiazole, purine, benzimidazole, imidazoline, or pyrimidine. Such stabilizers are desirably odorless and form a stable silver mercaptide. The photographic element can contain lightsensitive titanium dioxide. An image in an exposed photographic element containing a photographic sliver picomplex, a silver halide developing agent, and a silver pi-complex stabilizer can be developed and stabilized by heating the photographic element.

The Patent Oflice makes 

